Check taxonomy changes

[rBatt]

Check for changes in taxonomic classification during time series.

Approach 1

Ask data providers/ managers if, e.g., one group of organisms used to be ID'd to just Genus, but now to Spp. Etc.

Approach 2

Also, could check for this empirically. Use rle(), check for pres/ abs, and make sure each condition longest run sums to total possible. I.e., The longest run of consecutive absences + the longest run of consecutive presences = total length. Should be conducted at the region level. Would need to include all levels of classification.

4 possible outcomes if above rle condition is met:

1. new spp comes onto the scene w/ no previous analogue
2. spp disappears w/ no contemporary analogue
3. a taxon splits into several new, more specific, taxa
4. several specific taxa split into a new, more general, taxon

For 1 & 2, would just have to drop that spp altogether.

For 3 & 4, would have to choose between dropping or aggregating to broader common taxonomic classification (e.g., just using the genus if during one half genus was ID'd, then in other half species w/in that genus were ID'd).

[rBatt]

@JWMorley This is the problem Jim said he had with anchovy in the SEUS

[rBatt]

Done a lot of updating synonyms, asking data providers, checking confidence guides, and making my own personal guesses based on vague recommendations from data providers and confidence guides.

This is getting close to being as good as it ever will be